Construction of lamps



(Ho Model.) 2 spam-shee 1. J. P. BARRINGER &u T. H. JOH'NS-TON.

GONSTRUCTION OP LAMPS.

Patente'd Jan. 28, 1890.

WITMZ'SSES (No Model.) V V 2 Sheets-Sheet 2. J. P. BARRINGER &2 T. H. JOHNSTON.

GONSTEUGTION OF LAMPS Patented Jan. 28, 1890.

No. 4Z0,139.

w I EV OZ? S Wif /3882 N. PEI'ERS. Fholvuflwgnvhsn Washington. 0.&

NITED STATES PAT-ENT OFFICE JACOB P. BARRINGER AND THOlWlAS I-I. J OHNSTON OF HARRISBURG,

PENNSYLVANIA.

CONSTRUCTIION OF LAMPS.

SPECIFICATION forming part of Letters Patent No. 4 2o,1`39,aa. tec1 January 28, 1890.

Application filed February 18, 1889: Serial No. 300,259. (No model.) V

To all whom 't may concern:

Be it known that we, JACOB P. BARRINGER and THOMAS H. J OHNSTON, citizens 'of the United States, residing at Harrisburg, in the county of Dauphin and State of Pennsylvana, have invented certain new and useful Improvements in Construction of Lamps and we do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

Our invention has relation to certain new and useful improvements in lamps adapted for the purpose of street-illumination; and it consists of the parts and details of construction, as hereinaftermore fully pointed out in the drawings, described and claimed in the specification. v

The general obj ect of the invention consists in providing a street-illuminating lamp with means for the purpose of permitting of the ready insertion or removal of the glass from within the lamp-frame, and at the same time to provide for the -ready access thereto for cleaning purposes; and the invention further consists in providing means whereby adjustability may be given to the glass, and which at the same time will allow for the insertion of glass varying in thickness without causing disarrangement of the various pa'rts of the lamp-frarne. g

Referring to the dra'wings forming a part of this application, Figure 1 is a perspective View of a street-lamp embodying our improvements; Fig. 2, a longitudinal crosssection taken through line w w, Fig. 1. Fig. 3 is a detail View showing'the top .plate of our improved lamp. Fig. 4 is' a similar View showing the base-plate; Fig. 5, a perspective View showing our improved lamp'with the glass removed the'refrom. tFig. 6 is a detail view showing the glass-retaining olamp, 'and` F 7 a sectional view showin one ofthe lower extending arms with the angular grooves formed theren.

Similar letters of reference are used to designate corresponding parts throughout the entire specification and drawings. The letter A indicates the larnp proper, the top thereof consisting of the rectangular open frame A', and from said rectangular frame, at right angles thereto, project the arms b' b'. These arms terminate in angular ends, and have Secured thereto, by being welded or otherwise, the enlargedend pieces, which pieces are cut away, so as to form angular slots o'r grooves (Z, within which the ends of the glass are retained.`

The base of our improved lanp consists of the circular apertured plate B, from which laterally project the arms c c to a distance slightly beyond the extension of the upper arms bf b'. surrounding the circular apertured .plate B is the rectangular frame B', said frame corresponding 'with the upper rectangular open frame A'. It' desired, the circular plate, proj ecting arms, and reotangr lar frame may be composed of severalpieces rveted together; but by preference we stamp the same from one piece of metal. WVe also prefer to construct the upper open rectangular frame and projecting arms from the same piece of metal; but these maybe constructed, if' so desired, of two or more parts united together.

The circular plate B is provided with the apertnres n n' ri, and 'to the under side thereof is secured the metallic' disk 13 said disk being provided with apertures to correspond with those formed in the circular baseplate B'. The disk' B is providedwith the centrally-downward female threaded extension m. To this extension is secured the screw-threaded end of the pipe 0. By this Construction we are enabled, if so desired, to adapt the frame so as to be readily connected to the ordinary street-lamp; but we prefer to employ our improved lanp' in 'connection with electric lights, as shown in Fig. l of the drawings.

.The top and base platesof the frame are held together by means of the upright metallic rods O, which pass through holes formed in the projecting arms b' and e of said plates,

.threaded, so as to receive nuts, thereby making the same removable at will. The arms c c of the lower plate project somewhat beyond the arms b' b' of the upper plate and have formed therein, near the outer ends thereof, the angular groove d, for the purpose herein-- after more fully shown.

lVe have shown the four an gles of the rectangular frame of the top and bottom as being provided with lateral projections e' 6 and said projections as being provided with screw-threaded holes e e e e, within which work the thumb-screws f' f.

F represents the glass-retaining clamps secured to the angles of the rectangular frames. Said clamps are provided with the elongated opening g, which allows of adjustability being given to the same. As will be readily understood, the thumb-screws f' f pass through the elongated slots of the clamps F, and thence into the screw-threaded holes formed in the angles of the rectangular frames, and the consequent tightening or loosening of the same will necessarily lower or raise the clamping-plates, and at the same time when loosened will permit of the forward or backward movement of said plates, owing to the longitudinal play given thereto by reason of the elongated opening g. When it is desired to insert glass within the lampframe, the thumb-screws fare loosened, so as to raise the clamping-plates F'. The lower edge of the glass is then placed within the angular grooves d, formed in the projecting arms of the base-plate, and the same is held in position therein by means of the lower clamping-plates F, which are tightened sufliciently for this purpose by means of the thumb-screws f'. The clamp F' is then tightened by the thumb-screw f until the same has been brought to bear closely against the 'upper edge of the glass, thereby securely holding the same in an adjusted position within the frame. The removal of the glass is accomplished* by 'simply releasing the upper clamp and 'then lifting the same from within the angular grooves and lower retaining-clamp. By making the upper retainingclamp of lighter material than the lower ones, the glass may be removed orinserted without the necessity of unloosening the same, but by merely turning upward the overlappingflange f. By forming the clamping or retaining plates with elongated openings 'we are enabled to provide for the insertion of' glass varying in thickness. V

It is obvious that by constructing lamps in accordance with the above description one is obtained which will be more simple in its Construction and more durable than any device of a similar kind heretofore known to us and which at the same time will possess all the advantages of such as are now in common use, and which will permit of the ready insertion or removal of the glass when the same has become broken, or it is desired to clean the same from within the frame wth-.

out the necessity of removing the lamp, and which will consume the least amount of time and with less trouble than can be accomplished by the ordinary lamp.

We are aware that many miuor changes may be made in the details of Construction herein shown without departing from the nature and scope of our invention.

Having thus fully described our invention, what we claim as new, and desire to secure protection in by Letters Patent of the United States, is

1. The combination, with the frame of a lamp, of the laterally-projecting base-arms formed or provided with angular grooves, the glass, the glass-retaining clamps provided with elongated openings, and the thumb screws for giving adjustability to the retain ing-clamps, substantially as herein shown, and for the purpose set forth.

2. The combination, in a lamp, of the rect angular top and bottom plates, said plates being provided at the angles thereof with screw-threaded holes, the thumb-screws work ing in said holes, the slotted retaining-clamps, the projecting-arms, and the rods for securing and holding the top and bottom plates in position, substantially as herein shown and described.

3. In a lamp,the combination of the open rect an gular ba`se-piece formed with central perforated disk, said disk provided with radiating arms, the latter being provided or formed with angular grooves for the insertion of the glass, slotted retaining-clamps, thumb-screws passing through screw-threaded holes formed in the'angles of the rectangular base-piece and aftording means for adjusting the clamps, the rectangular top piece formed or provided with laterally-extending arns, and also provided at its angles with sorew-threaded holes, the slotted retaining-clamps, thumb-screws, the upright supporting-rods, and the glass, substantially as set forth. t

l. The combination, with the herein-described lamp-frame, of the rectangular top or base plate, arms projecting at right angles therefrom, said arms terminating in angular ends, and the end pieces welded or otherwise secured to the under side of said arms and terminating in V-shaped enlargements, thereby forming angular grooves between the ends of the arms and said enlarged `portion of the end pieces wherein the ends of the glass may be retained.

5. The combination, with the frame of a? lamp, of the upper open rectangular plate or frame, arns projecting at right angles from said plate, lower metallic rectangular base- IOO IIO

IZO

plate, arms projectng at right angles there- In testnony whereof we 'affix our signafrom and terminatng in V-shaped enlargetures iu presence of two witnesses. i ments, said enla'ged portion being cut away J ACOB P. BARRINGER. so as to form right-&ngulm grooves for the THOMAS H. J OHNSTON.

5 retention of the glass, and the meta-Ilia rods witnesses:

for connectng said top and bottom plates, S. W. FLEMING, substantially as herei shown and described. A. J. YOUTEN. 

